01 - In a large mixing bowl, whisk together the all-purpose flour, instant yeast, granulated sugar, and kosher salt until evenly distributed.
02 - Pour the warm water (110°F) and olive oil into the dry mixture. Stir with a wooden spoon until a shaggy dough forms and no dry flour pockets remain.
03 - Turn the dough out onto a lightly floured work surface. Knead firmly for 6 to 8 minutes until the dough becomes smooth, supple, and springs back when gently pressed.
04 - Transfer the dough to a lightly oiled bowl, turning once to coat all sides. Cover tightly with plastic wrap or a clean kitchen towel and place in a warm, draft-free spot for 45 to 60 minutes until doubled in volume.
05 - Preheat the oven to 400°F. Line a large baking sheet with parchment paper and set aside.
06 - Gently punch down the risen dough to release excess gas. Divide into 12 equal portions. Roll each portion into a 7 to 8-inch rope, tapering the ends slightly, and arrange on the prepared baking sheet with 2 inches of space between each.
07 - Cover the shaped breadsticks loosely with a towel and let rest for 15 minutes until puffed and slightly risen.
08 - Bake on the center rack for 12 to 15 minutes until the tops are golden brown and the bottoms sound hollow when tapped.
09 - While the breadsticks bake, combine the melted unsalted butter, minced garlic, dried parsley, garlic powder, and salt in a small bowl. Mix until well blended.
10 - Remove the breadsticks from the oven and immediately brush generously with the garlic butter mixture using a pastry brush, coating each breadstick thoroughly. Serve warm.